Hello All, I need to realise an application. Therefore I want to make a schedule where different things can be scheduled. I search on internet but don't know how i can realise the following things: When i make a new schedule there must be three options in an NewEdit: 1. individual conversation 2. lesson 3. Assessment When i select option one, i want to select a teacher and a student by a dropdown. When i select option two, i want to select a teacher and a class. And for option 3 also something different. So these things must be dynamic. Can anybody help me out, because I don't know that function to use for this.